668040622911 has 8 divisors (see below), whose sum is σ = 989689811760. Its totient is φ = 445360415256.

The previous prime is 668040622897. The next prime is 668040622913. The reversal of 668040622911 is 119226040866.

668040622911 is a `hidden beast` number, since 6 + 6 + 8 + 0 + 4 + 0 + 622 + 9 + 11 = 666.

It is not a de Polignac number, because 668040622911 - 2¹⁰ = 668040621887 is a prime.

It is a super-2 number, since 2×668040622911² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668040622913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12371122620 + ... + 12371122673.

It is an arithmetic number, because the mean of its divisors is an integer number (123711226470).

Almost surely, 2^668040622911 is an apocalyptic number.

668040622911 is a deficient number, since it is larger than the sum of its proper divisors (321649188849).

668040622911 is a wasteful number, since it uses less digits than its factorization.

668040622911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24742245302 (or 24742245296 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 668040622911 in words is "six hundred sixty-eight billion, forty million, six hundred twenty-two thousand, nine hundred eleven".